I could divide you could divide he could divide we could divide you could divide they could divide
V-ing form
I could be dividing you could be dividing he could be dividing we could be dividing you could be dividing they could be dividing
Perfect
I could have divided you could have divided he could have divided we could have divided you could have divided they could have divided
V-ing perfect
I could have been dividing you could have been dividing he could have been dividing we could have been dividing you could have been dividing they could have been dividing
Negation
Simple form
I couldn't divide you couldn't divide he couldn't divide we couldn't divide you couldn't divide they couldn't divide
V-ing form
I couldn't be dividing you couldn't be dividing he couldn't be dividing we couldn't be dividing you couldn't be dividing they couldn't be dividing
Perfect
I couldn't have divided you couldn't have divided he couldn't have divided we couldn't have divided you couldn't have divided they couldn't have divided
V-ing perfect
I couldn't have been dividing you couldn't have been dividing he couldn't have been dividing we couldn't have been dividing you couldn't have been dividing they couldn't have been dividing
Interrogative form
Simple form
could I divide? could you divide? could he divide? could we divide? could you divide? could they divide?
V-ing form
could I be dividing? could you be dividing? could he be dividing? could we be dividing? could you be dividing? could they be dividing?
Perfect
could I have divided? could you have divided? could he have divided? could we have divided? could you have divided? could they have divided?
V-ing perfect
could I have been dividing? could you have been dividing? could he have been dividing? could we have been dividing? could you have been dividing? could they have been dividing?
Interro-negative form
Simple form
couldn't I divide? couldn't you divide? couldn't he divide? couldn't we divide? couldn't you divide? couldn't they divide?
V-ing form
couldn't I be dividing? couldn't you be dividing? couldn't he be dividing? couldn't we be dividing? couldn't you be dividing? couldn't they be dividing?
Perfect
couldn't I have divided? couldn't you have divided? couldn't he have divided? couldn't we have divided? couldn't you have divided? couldn't they have divided?
V-ing perfect
couldn't I have been dividing? couldn't you have been dividing? couldn't he have been dividing? couldn't we have been dividing? couldn't you have been dividing? couldn't they have been dividing?